81972330281920

Names of 81972330281920

• Cardinal: 81972330281920 can be written as Eighty-one trillion, nine hundred seventy-two billion, three hundred thirty million, two hundred eighty-one thousand, nine hundred twenty.

Scientific notation

• Scientific notation: 8.197233028192 × 10¹³

Factors of 81972330281920

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 11373

Divisors of 81972330281920

• Number of divisors d(n): 224
• Complete list of divisors:
  1 2 4 5 8 10 13 16 20 26 32 40 52 64 65 80 104 130 160 208 260 320 416 520 832 1040 1093 2080 2186 2251 4160 4372 4502 5465 8009 8744 9004 10930 11255 14209 16018 17488 18008 21860 22510 28418 29263 32036 34976 36016 40045 43720 45020 56836 58526 64072 69952 71045 72032 80090 87440 90040 104117 113672 117052 128144 142090 144064 146315 160180 174880 180080 208234 227344 234104 256288 284180 292630 320360 349760 360160 416468 454688 468208 512576 520585 568360 585260 640720 720320 832936 909376 936416 1041170 1136720 1170520 1281440 1665872 1872832 2082340 2273440 2341040 2460343 2562880 3331744 4164680 4546880 4682080 4920686 6663488 8329360 8753837 9364160 9841372 12301715 16658720 17507674 18028259 19682744 24603430 31984459 33317440 35015348 36056518 39365488 43769185 49206860 63968918 70030696 72113036 78730976 87538370 90141295 98413720 113799881 127937836 140061392 144226072 157461952 159922295 175076740 180282590 196827440 227599762 234367367 255875672 280122784 288452144 319844590 350153480 360565180 393654880 455199524 468734734 511751344 560245568 568999405 576904288 639689180 700306960 721130360 787309760 910399048 937469468 1023502688 1137998810 1153808576 1171836835 1279378360 1400613920 1442260720 1820798096 1874938936 2047005376 2275997620 2343673670 2558756720 2801227840 2884521440 3641596192 3749877872 4551995240 4687347340 5117513440 5769042880 7283192384 7499755744 9103990480 9374694680 10235026880 14999511488 18207980960 18749389360 19704887087 36415961920 37498778720 39409774174 74997557440 78819548348 98524435435 157639096696 197048870870 256163532131 315278193392 394097741740 512327064262 630556386784 788195483480 1024654128524 1261112773568 1280817660655 1576390966960 2049308257048 2561635321310 3152781933920 4098616514096 5123270642620 6305563867840 8197233028192 10246541285240 16394466056384 20493082570480 40986165140960 81972330281920
• Sum of all divisors σ(n): 210523814907840
• Sum of proper divisors (its aliquot sum) s(n): 128551484625920
• 81972330281920 is an abundant number, because the sum of its proper divisors (128551484625920) is greater than itself. Its abundance is 46579154344000

Bases of 81972330281920

• Binary: 10010101000110110101011101000001011101111000000₂
• Hexadecimal: 0x4A8DABA0BBC0
• Base-36: T21KGZJ5S

Squares and roots of 81972330281920

• 81972330281920 squared (81972330281920²) is 6719462931848178626678886400
• 81972330281920 cubed (81972330281920³) is 550810034766577398031706998446623653888000
• The square root of 81972330281920 is 9053857.2046349395
• The cube root of 81972330281920 is 43439.9276990861

Scales and comparisons

• 81,972,330,281,920 seconds is equal to 2,606,466 years, 28 weeks, 2 days, 16 hours, 58 minutes, 40 seconds.
• To count from 1 to 81,972,330,281,920 would take you about six million, five hundred sixteen thousand, one hundred sixty-six years!

  This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)

• A cube with a volume of 81972330281920 cubic inches would be around 3620 feet tall.

Recreational maths with 81972330281920

• 81972330281920 backwards is 02918203327918
• The number of decimal digits it has is: 14
• The sum of 81972330281920's digits is 55
• More coming soon!